JP6128430B2 - Power storage module - Google Patents

Description

  The present invention relates to a power storage module including a power storage element such as a battery cell (single cell) or a capacitor, and an adjacent member arranged side by side with the power storage element.

  The power storage module includes a power storage element, an adjacent member arranged side by side with the power storage element, and a frame that integrally holds the power storage element and the adjacent member (see Patent Document 1). The power storage element includes an electrode body and a case that accommodates the electrode body. The adjacent member includes a main body disposed adjacent to the case of the power storage element.

  In general, since an electricity storage element generates heat as it is charged and discharged, this type of electricity storage module includes a flow path through which a cooling medium such as gas or liquid flows along the case of the electricity storage element. In connection with this, the main body of the adjacent member of this kind of electrical storage module includes a plurality of flow path forming portions that form flow paths.

  Incidentally, in this type of power storage module, the adjacent member may have a holding portion that holds the adjacent power storage element. Specifically, the adjacent member is a main body that faces the power storage element, an extension portion that extends from the main body to the power storage element side, and a holding portion that is provided on the distal end side of the extension portion. And a holding portion that holds the power storage element in cooperation with each other. Then, the adjacent member has the groove forming portion of the main body in contact with one surface of the electricity storage element, and the holding portion is in contact with the other surface opposite to the one surface of the electricity storage element so as to sandwich the electricity storage element. Hold. However, the holding part may overlap with part or all of the flow path provided along the case. Therefore, the holding part may block the flow path. As a result, the cooling efficiency of the power storage module decreases.

JP 2012-064356 A

  Accordingly, an object of the present invention is to provide a power storage module that can secure a cooling performance for a power storage element while holding the power storage element without blocking a flow path of a cooling medium that cools the power storage element.

The power storage module according to the present invention includes:
A storage element;
An adjacent member arranged side by side on both sides of the electricity storage element,
The adjacent member is
A main body facing the power storage element;
An extending portion extending from the main body to the storage element side;
A holding portion provided on a distal end side of the extending portion, the holding portion holding a power storage element in cooperation with the main body,
The main body has a flow path forming part that forms a flow path between the main body and one surface of the electricity storage element facing the surface .
Holding portion is provided Oite the body, the position of the flow path forming portion is provided in the other adjacent member faces opposite to the other surface of a another adjacent member adjacent across the storage element storage element It is,
The flow path forming portions are provided on both surfaces of the main body, and are disposed so as to be displaced from each other on both surfaces .

According to this configuration, the flow path is formed between the one surface of the power storage element facing the main body of the adjacent member and the flow path forming portion of the adjacent member by holding the power storage element in the adjacent member. . A holding portion is disposed at a position where the flow path forming portion of another adjacent member facing the other surface of the power storage element is provided. A flow path is also formed between the other adjacent member and the power storage element. However, the holding part is provided at a position corresponding to the position where the flow path forming part is provided in the main body and at a position where the flow path forming part of the other adjacent member is provided. It is arranged at a position that avoids. Therefore, it is difficult for the holding portion to be disposed on the flow path. Therefore, the flow of the cooling medium is not hindered by the holding unit, and the cooling performance of the power storage module can be ensured.
Moreover, according to this structure, a flow-path formation part is provided in both surfaces of a main body. By disposing the power storage elements on both surfaces of the main body, the first energy storage element is held between the one power storage element held by the adjacent member and the flow path forming portion on one surface of the main body facing the one power storage element. A flow path is formed. A second flow path is formed between the other power storage element and a flow path forming portion on the other surface of the main body facing the other power storage element. The second flow path is provided at a position shifted from the position where the first flow path is formed in the main body. The holding part is arranged at a position overlapping the flow path forming part that forms the first flow path in the other adjacent member. The holding portion is disposed at a position that is unlikely to interfere with the first flow path and the second flow path. Therefore, the flow of the cooling medium is not hindered by the holding unit, and the cooling performance of the power storage module can be ensured.

In addition, the power storage module according to the present invention,
A storage element;
Adjacent members arranged side by side on both sides of the electricity storage element;
With
The adjacent member is
A main body facing the power storage element;
An extending portion extending from the main body to the storage element side;
A holding portion provided on a distal end side of the extending portion, the holding portion holding the power storage element in cooperation with the main body;
With
The main body has a flow path forming part that forms a flow path between the main body and one surface of the electricity storage element facing the surface.
The holding portion is provided in the main body at a position where the flow path forming portion of another adjacent member that is adjacent to the other surface of the power storage element and is adjacent to the other side of the power storage element is provided,
The extending part extends from the flow path forming part in the main body from the opposite side of the groove formed by the flow path forming part.

According to this configuration, the flow path is formed between the one surface of the power storage element facing the main body of the adjacent member and the flow path forming portion of the adjacent member by holding the power storage element in the adjacent member. . A holding portion is disposed at a position where the flow path forming portion of another adjacent member facing the other surface of the power storage element is provided. A flow path is also formed between the other adjacent member and the power storage element. However, the holding part is provided at a position corresponding to the position where the flow path forming part is provided in the main body and at a position where the flow path forming part of the other adjacent member is provided. It is arranged at a position that avoids. Therefore, it is difficult for the holding portion to be disposed on the flow path. Therefore, the flow of the cooling medium is not hindered by the holding unit, and the cooling performance of the power storage module can be ensured.
Moreover, according to this structure, the extension part is arrange | positioned so that it may not overlap with the flow path formed between the groove | channel of a main body, and an electrical storage element, and it can ensure the cooling performance of an electrical storage module.

in this case,
The length of the holding portion in the direction intersecting with the extending direction of the holding portion can be set to be equal to or shorter than the length of the flow path forming portion in the same direction.

  According to such a configuration, it is difficult for the holding part to protrude from the flow path forming part. Therefore, it is possible to arrange the holding part so as not to overlap the flow path formed by another flow path forming part that is arranged with a position shifted with respect to the flow path forming part, and to ensure the cooling performance of the power storage module. Can do.

Further, as another aspect of the power storage module according to the present invention,
The thickness of the holding part can be made equal to or less than the thickness of the flow path forming part.

  According to such a configuration, the holding portion is difficult to protrude in the thickness direction of the flow path forming portion. Therefore, it can arrange | position so that a holding | maintenance part may not overlap with the flow path which this flow path formation part forms, and the cooling performance of an electrical storage module can be ensured.

Further, as another aspect of the power storage module according to the present invention,
A spacer disposed between the storage elements;
The power storage element and a termination member that sandwiches the spacer can be provided.

  According to such a configuration, even if the flow path forming part is shifted to the main body side, the holding part is arranged at a position overlapping with the flow path forming part, and the holding part is arranged avoiding the flow path.

Further, as yet another aspect of the power storage module according to the present invention,
The adjacent member can be a spacer disposed between the power storage elements.

  According to such a configuration, the spacer is disposed between the power storage elements, can form a flow path between adjacent power storage elements, and cool the power storage elements.

Further, as yet another aspect of the power storage module according to the present invention,
The extension is
An extension body,
A protruding portion that partially protrudes from the tip of the extending portion main body, the protruding portion extending beyond the power storage element, and disposed so as to overlap the flow path forming portion of the adjacent member. ,
Hold unit may be as is connected to the convex portion.

  According to such a configuration, the extending part is arranged so that the convex part partially protruding from the tip of the extending part main body overlaps the flow path forming part beyond the power storage element, and does not overlap the flow path. Placed in. Since the extension part main body does not extend beyond the power storage element, the extension part main body is disposed at a position that does not overlap the flow path. Therefore, the cooling performance of the power storage module is ensured.

  As described above, according to the present invention, it is possible to achieve an excellent effect that the cooling performance for the power storage element can be secured while holding the power storage element without blocking the flow path of the cooling medium that cools the power storage element.

FIG. 1 is a perspective view of a battery module which is an embodiment of a power storage module according to the present invention. FIG. 2 shows a front view of the battery module. FIG. 3 shows an exploded perspective view of the battery module. FIG. 4 is a longitudinal sectional view showing a state in which a plurality of battery cells and spacers are aligned. FIG. 5 shows a side view of the spacer as viewed from one side of the spacer body. FIG. 6 shows a perspective view of the spacer as viewed from one side of the spacer body. FIG. 7 is a perspective view of the spacer as viewed from the other surface side of the spacer body.

  Hereinafter, a battery module which is an embodiment of a power storage module according to the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 to 3, the battery modules 1 are arranged side by side on a plurality of battery cells 3 aligned in a row, and between adjacent battery cells 3 and on both sides of the plurality of battery cells 3 in the alignment direction. A plurality of spacers 5, a plurality of battery cells 3, a frame 7 that holds the plurality of spacers 5, and a cell monitoring circuit that monitors at least one of the voltage, current, or temperature of each of the plurality of battery cells 3 for each battery cell 3. (CMU: Cell Monitor Unit) module 9. The “storage element” of the present invention is the battery cell 3 in the present embodiment. The “adjacent member” of the present invention is the spacer 5 in the present embodiment.

  In the following, for the sake of convenience, the first direction is referred to as the Z direction (the Z-axis direction of the orthogonal axes shown in each figure), and the second direction orthogonal to the first direction is referred to as the Y direction (shown in each figure). The third direction perpendicular to the first direction and the second direction is referred to as the X direction (the X axis direction of the orthogonal axes shown in each drawing). In each figure, the X, Y, and Z symbols are attached to one side in each of the X, Y, and Z directions. When the Z direction is placed in the vertical direction, the Z direction is the up / down direction, the Y direction is the left / right direction, and the X direction is the front / rear direction.

  As shown in FIG. 3, the battery cell 3 includes an electrode body and a case 30 that houses the electrode body. The case 30 includes a case main body 31 having an opening and a lid 32 that closes and seals the opening of the case main body 31. In case 30, an electrode body (not shown) including a positive electrode plate and a negative electrode plate which are insulated from each other is accommodated. The battery cell 3 is a rectangular battery flat in the X direction.

  The battery cell 3 includes a pair of positive and negative electrode terminals 33. The adjacent battery cells 3 are arranged so that the polarities are opposite. A bus bar 34 is attached to the electrode terminal 33 of the adjacent battery cell 3. In addition, a nut is screwed onto the electrode terminal 33. Thereby, the some battery cell 3 is electrically connected and comprises one battery.

  The spacer 5 is made of synthetic resin and has an insulating property. The spacer 5 has a spacer main body 50 (as a main body of the present invention) facing the battery cell 3, and an outer periphery of the battery cell 3 extending from the spacer main body 50 in the X direction and facing the spacer main body 50 in the X direction. And a holding body 51 that holds the end portion. Corresponding to the case 30 of the battery cell 3 having a rectangular shape when viewed from the X direction, the spacer body 50 is formed in a rectangular shape. The holding body 51 includes a corner holding portion 52 formed to face the four corners of the spacer main body 50 and an inter-corner holding portion 53 formed at the center of each of the three sides of the spacer main body 50. ing.

  In the battery module 1 according to this embodiment, a gap is formed between the battery cells 3. The battery cell 3 is cooled by air flowing through the gap. That is, the cooling method of the battery module 1 is an air cooling type. The spacer 5 of the air-cooled battery module 1 is provided to ensure an air flow path. The spacer body 50 of the spacer 5 has a rectangular wave cross-sectional shape.

  As shown in FIGS. 4 to 7, the spacer main body 50 includes a flow path forming portion 54 that forms a groove-shaped flow path extending in the Y direction. The flow path forming portions 54 are arranged on the both surfaces of the spacer body 50 so that their positions are shifted from each other in the Z direction. The flow path forming portion 54 continuously extends in the Y direction from one end in the Y direction to the other end opposite to the one end. Two or more flow path forming portions 54 are arranged in the Z direction. Specifically, as shown in FIG. 4, four flow path forming portions 54 are provided on one surface (left direction in FIG. 4) of the spacer body 50, and the other surface (right direction in FIG. 4). 3) are provided.

  The flow path forming part 54 forms the groove part 540. A plurality of flow path forming portions 54 are formed by forming the spacer body 50 in an uneven shape. The flow path forming portion 54 forms a flow path between the groove portion 540 and the side surface of the case body 31 of the battery cell 3 that faces the groove portion 540. This flow path serves as an air path for flowing outside air (air). The spacer body 50 has one surface on which the groove 540 is formed and the other surface opposite to the one surface. The other surface side of the flow path forming portion 54 is formed on the ridge 541. The ridge 541 contacts the side surface of the case body 31 of another battery cell 3 that faces the ridge 541. The other battery cell 3 is a battery cell 3 different from the battery cell 3 facing the groove 540. Next to the flow path forming portion 54 provided in one surface of the spacer body 50 (in the Z direction), a ridge 541 of the flow path forming portion 54 provided in the other surface of the spacer main body 50 is disposed. . That is, on one surface of the spacer body 50, the groove portions 540 and the ridges 541 (the top portions 544 described later) are alternately arranged. The same applies to the other surface.

  The groove portion 540 includes a bottom portion 542 that extends in the Y direction of the spacer body 50 with a substantially constant width, and a pair of inner wall portions 543 that extend toward the battery cell 3 from the longitudinal edge of the bottom portion 542. The bottom portion 542, the pair of inner wall portions 543, and the side surface of the case main body 31 of the battery cell 3 form a flow path having a rectangular shape in cross section.

  The ridge 541 includes a top portion 544 and a side wall portion 545 that supports the top portion 544. The top portion 544 makes surface contact with the side surface of the case body 31. The side wall part 545 supports the top part 544 in order to keep the distance between the adjacent battery cells 3 constant.

  These flow path forming portions 54 form a flow path between any one of the battery cells 3 facing each other on both sides of the spacer body 50. A first flow path is formed between the groove 540 provided on one surface and the one battery cell 3. The first flow path cools one battery cell 3. A second flow path is formed between the groove 540 provided on the other surface and the other battery cell 3. The second flow path cools the other battery cell 3. The first flow path and the second flow path are alternately arranged between the adjacent battery cells 3 and 3.

  As shown in FIGS. 6 and 7, the corner holding part 52 is arranged at two diagonal positions (four corners) centered on the center of the case 30 of the battery cell 3 in order to stably restrain the battery cell 3. The four corners of the case 30 of the battery cell 3 are held. The corner portion holding portion 52 extends from the orthogonal end edges in the Y direction and Z direction at the corner portion of the spacer body 50 to both sides on one side and the other side in the X direction. The inner surface of the corner holding portion 52 is in contact with the corner portion of the outer peripheral end portion of the battery cell 3. These inner surfaces are formed in a wall shape (flat plate shape). The corner holding part 52 prevents the cooling medium from flowing outside the flow path.

  5-7, the corner | angular part holding | maintenance part 52 is a pair of upper corner | angular part holding | maintenance part 52A contact | abutted with a pair of upper corner | angular part of the battery cell 3, and a pair of lower corner | angular part of the battery cell 3, respectively. And a lower corner holding portion 52B that comes into contact with the bottom surface and the bottom surface. The pair of upper corner holding portions 52 </ b> A is provided at the edge of the upper end side of one end and the other end of the spacer body 50 in the Y direction. The lower corner holding portion 52B is provided on an edge extending from the lower end side of one end of the spacer body 50 in the Y direction to the lower end side of the other end of the spacer body 50 via the bottom surface. The corner holding part 52 functions as a positioning part for positioning adjacent battery cells 3.

  The inter-corner holding portion 53 includes a top holding portion 53A provided at the central portion of the top portion (top side) of the spacer main body 50 and a first portion provided at the central portion of the left and right side portions (side sides) of the spacer main body 50. One side portion holding portion 53B and a second side portion holding portion 53C are provided.

  Each of the top holding portion 53A, the first side holding portion 53B, and the second side holding portion 53C has an extending piece 530 that extends in the X direction (to the battery cell 3 side). The extending piece 530 is formed in a wall shape, and specifically, is formed uniformly and flat. The extension piece 530 of the first side portion holding portion 53B has an extension portion main body 530a and a convex portion 530b partially protruding from the tip of the extension portion main body 530a. The extension part main body 530 a is a part facing the case 30 of the battery cell 3, and the convex part 530 b is a part extending beyond the case 30 of the battery cell 3. The convex portion 530 b is provided at a position corresponding to the position where the flow path forming portion 54 is provided in the spacer body 50. The length (width) of the convex portion 530b in the Z direction is the same as or substantially the same as that of the flow path forming portion 54. The extending piece 530 of the first side portion holding portion 53B extends so that the length in the X direction is substantially the same as the thickness dimension of the battery cell 3 in the X direction. The extending piece 530 of the second side portion holding portion 53C extends so that the length in the X direction is shorter than the thickness dimension of the battery cell 3 in the X direction. The “extending portion” of the present invention is the extending piece 530 in the present embodiment.

  Each of the top portion holding portion 53A and the first side portion holding portion 53B has a protruding piece 531 protruding inwardly at the distal end portion of the extending piece 530 (in the case of the first side portion holding portion 53B, the convex portion 530b). I have. The projecting piece 531 clamps and holds the battery cell 3 in cooperation with the spacer body 50. The protruding piece 531 of the top holding portion 53 </ b> A protrudes downward from the spacer body 50. The protruding piece 531 of the first side holding portion 53B is provided at a position corresponding to the position where the flow path forming portion 54 is provided in the spacer body 50.

  As shown in FIG. 5, the thickness in the X direction of the protruding piece 531 of the first side portion holding portion 53B is the same as the thickness in the X direction of the region in contact with the battery cell 3 in the flow path forming portion 54. In a state where the spacer 5 holds the battery cell 3, the protruding piece 531 is in pressure contact with the side surface of the battery cell 3. Therefore, the length that the protruding piece 531 protrudes from the side surface of the battery cell 3 in the X direction corresponds to the thickness of the protruding piece 531.

  The length of the protruding piece 531 in the Z direction (direction intersecting with the direction in which the flow path extends) is equal to or smaller than the width of the flow path forming portion 54. The protruding piece 531 of the first side holding portion 53B protrudes toward the second side holding portion 53C. The second side holding portion 53 </ b> C includes a protrusion 532 that protrudes inwardly at the tip of the extending piece 530. The “holding portion” of the present invention is the protruding piece 531 in the present embodiment.

  The extending piece 530 extends from the flow path forming part 54 in the spacer body 50 from the opposite side of the groove part 540 formed by the flow path forming part 54. The extending piece 530 is formed so as to extend from a position in the spacer main body 50 avoiding the groove portion 540 of the flow path forming portion 54. Moreover, the opening 533 is formed in the 1st side part holding | maintenance part 53B and the 2nd side part holding | maintenance part 53C. The opening 533 is formed through the positions of the first side holding part 53B and the second side holding part 53C corresponding to the entrance / exit of the flow path formed by the flow path forming part 54. The opening 533 obtained by cutting out the extending piece 530 has an opening area larger than the cross-sectional shape of the groove 540. That is, the opening 533 is provided at a position that does not block the flow path. Therefore, the opening 533 does not hinder the flow of air passing through the flow path. Further, a part of the side surface of the case 30 of the battery cell 3 is exposed through the opening 533. Therefore, the opening 533 also promotes heat dissipation from the case 30 and also has a function of cooling the side surface of the battery cell 3.

  FIG. 4 shows a state in which the spacer 5 holds the battery cell 3. As shown in FIGS. 6 and 7, each of the four corner portions of the outer peripheral end portion (of the case 30) of the battery cell 3 is held by the corner portion holding portion 52. The top portion is held by the top holding portion 53A. The left and right side portions are held by the first side portion holding portion 53B and the second side portion holding portion 53C. Of the top of the battery cell 3, the surface in the direction in which the top holding portion 53A extends (the surface opposite to the surface facing the spacer main body 50 in the case 30 of the battery cell 3) protrudes from the top holding portion 53A. The piece 531 is locked. Of the one side portion of the battery cell 3, the protruding piece 531 of the first side portion holding portion 53 </ b> B is locked to the surface in the direction in which the first side portion holding portion 53 </ b> B extends. A protrusion 532 of the second side portion holding portion 53C is in contact with the other side portion of the battery cell 3. Thus, the battery cell 3 is held by the spacer 5 and integrated with the spacer 5.

  As shown in FIGS. 1 to 3, the frame 7 is disposed on both sides of the plurality of battery cells 3 in the X direction and has a pair of termination members 70 (so-called so-called sandwiching the plurality of battery cells 3 and the plurality of spacers 5 in the X direction). An end plate) and a connecting member 75 that connects the pair of terminal members 70 and fastens the plurality of battery cells 3 and the plurality of spacers 5 together. That is, the battery cell 3 and the spacer 5 are aligned in a line. And the battery cell 3 and the spacer 5 are pressurized in the battery stacking direction by being sandwiched between the terminal members 70 at one end while being stacked on a straight line.

  The termination member 70 is made of metal such as aluminum formed by casting, for example. The termination member 70 is arranged on the outermost side between the battery cell 3 and the spacer 5 disposed between the battery cells 3, and presses the spacer 5 and the battery cell 3. The termination member 70 includes a termination member main body 71 and leg portions 72 projecting outward in the X direction from the lower portion of the termination member main body 71. Similarly to the spacer main body 50, the terminal member main body 71 is formed in a rectangular shape corresponding to the rectangular shape of the case 30 of the battery cell 3 when viewed from the X direction.

  A pair of connecting members 75 are provided on both sides of the plurality of battery cells 3 in the Y direction. That is, the connecting member 75 includes a connecting member 75 that is arranged to face the plurality of battery cells 3 from one side in the Y direction, and a connecting member 75 that is arranged to face the plurality of battery cells 3 from the other side in the Y direction. ing. The connecting member 75 includes a pair of cross beam portions 76 (connecting portions) extending along the X direction and parallel to each other, and one end portion and the other end portion of the pair of cross beam portions 76 in the X direction. And a pair of longitudinal beam portions 77 to be connected. The connecting member 75 has a rectangular frame shape as a whole. The pair of horizontal beam portions 76 of the connecting member 75 are disposed in the vicinity of two diagonal positions (four corners) around the center of the case 30 of the battery cell 3 on the surface along the X direction of the battery cell 3 and the spacer 5. ing.

  The cell monitoring circuit module 9 is obtained by housing a cell monitoring circuit (not shown) in a circuit case 90. The circuit case 90 includes a case main body 91 having an opening and a lid 92 that closes and seals the opening of the case main body 91.

  The battery module 1 having the above configuration is assembled as follows. That is, as shown in FIG. 3, first, a plurality of battery cells 3 are stacked while the spacers 5 are arranged therebetween. Spacers 5 are also arranged outside the battery cells 3 at one end and the other end. Furthermore, a pair of termination | terminus member 70 is arrange | positioned at the both sides. A pair of connecting members 75 are arranged in the plurality of battery cells 3 from the Y direction in a state where a compressive force in the X direction is applied between the pair of terminal members 70. Then, the screw portions of the bolts 85 inserted into the through holes of the connecting member 75 are screwed into the female screws of the termination member 70, and the plurality of battery cells 3 and the plurality of spacers 5 are integrated with the frame 7. Thereafter, the cell monitoring circuit module 9 is arranged and attached to the plurality of battery cells 3 from the Z direction. In this way, the battery module 1 is completed.

  In the battery module 1 having the above configuration, by holding the battery cell 3 in the spacer 5, one surface of the battery cell 3 facing the spacer body 50 of the spacer 5, the flow path forming portion 54 of the spacer 5, and A flow path is formed between the two. A protruding piece 531 is disposed at a position where the flow path forming portion 54 of the other spacer 5 facing the other surface of the battery cell 3 is provided. A flow path is also formed between the other spacer 5 and the battery cell 3. However, the protruding piece 531 is provided at a position corresponding to the position where the flow path forming portion 54 is provided in the spacer main body 50 and at a position where the flow path forming portion 54 of the other spacer 5 is provided. It is arranged at a position where the flow path by the spacer 5 is avoided. Therefore, the protruding piece 531 does not overlap on the flow path. In short, by providing the protruding piece 531 at a position other than the flow path, it becomes difficult to block the flow path. The flow of the cooling medium is not hindered by the protruding pieces 531, and the cooling performance of the power storage module 1 can be ensured.

  Further, the flow path forming portions 54 are provided on both surfaces of the spacer body 50. For this reason, by arranging the battery cells 3 on both surfaces of the spacer main body 50, the flow of the one battery cell 3 held by the spacer 5 and the flow of one surface of the spacer main body 50 facing the one battery cell 3 is opposed. A first flow path is formed between the path forming portion 54 and the first path. In addition, a second flow path is formed between the other battery cell 3 and the flow path forming portion 54 on the other surface of the spacer body 50 facing the other battery cell 3. The second flow path is provided at a position shifted from the position where the first flow path is formed in the spacer body 50. The protruding piece 531 is disposed at a position overlapping the flow path forming portion 54 that forms the first flow path in the other spacer 5. The projecting piece 531 is disposed at a position that is unlikely to interfere with the first flow path and the second flow path. Therefore, the flow of the cooling medium is not hindered by the protruding pieces 531 and the cooling performance of the power storage module 1 can be ensured.

  Further, the length of the protruding piece 531 in the direction intersecting with the extending direction of the protruding piece 531 is equal to or shorter than the length of the flow path forming portion 54 in the same direction. For this reason, the protruding piece 531 is difficult to protrude from the flow path forming portion 54. Therefore, the protruding piece 531 can be arranged so as not to overlap the flow path formed by another flow path forming part 54 that is arranged with a position shifted with respect to the flow path forming part 54, and the cooling performance of the power storage module 1. Can be secured.

  Further, the thickness of the protruding piece 531 is equal to or less than the thickness of the flow path forming portion 54. For this reason, the protruding piece 531 does not easily protrude in the thickness direction of the flow path forming portion 54, and the protruding piece 531 can be arranged so as not to overlap the flow path formed by the flow path forming portion 54. The cooling performance can be ensured.

  In addition, the termination member 70 presses the battery cell 3 and the spacer 5 disposed between the battery cells 3 so that the flow path forming portion 54 of the spacer body 50 of the spacer 5 is brought into close contact with the battery cell 3. Even if the flow path forming portion 54 approaches the spacer main body 50 side, the protruding piece 531 is disposed at a position overlapping with the flow path forming portion 54, and the protruding piece 531 is arranged to avoid the flow path. Can form a flow path between the battery cell 3 at the end and cool the battery cell 3. And when the termination | terminus member 70 pressurizes the battery cell 3, the distance between the spacers 5 and the distance between the battery cells 3 become short. In particular, in the battery module 1 that pressurizes the battery cell 3 without positioning each battery cell 3 in advance, the distance is likely to be shortened. Even in this case, the flow path is not blocked by making the thickness of the protruding piece 531 equal to or less than the thickness of the spacer body 50 of the spacer 5. Moreover, the spacer 5 is arrange | positioned between the battery cells 3, can form a flow path between the adjacent battery cells 3, and can cool this battery cell 3. FIG.

  The extension piece 530 extends from the flow path forming portion 54 in the spacer body 50 from the opposite side of the groove portion 540 formed by the flow path forming portion 54. For this reason, the extended piece 530 is arrange | positioned so that it may not overlap with the flow path formed between the groove part 540 of the spacer main body 50, and the battery cell 3, and the cooling performance of the electrical storage module 1 can be ensured.

  The extension piece 530 includes an extension part main body 530a and a convex part 530b partially protruding from the tip of the extension part main body 530a, and a convex part 530b extending beyond the battery cell 3. And have. The extension part 530 is arranged so that the convex part 530b partially protruding from the tip of the extension part body 530a overlaps the flow path forming part 54 beyond the battery cell 3, and does not overlap the flow path. Be placed. Since the extension part main body 530a does not extend beyond the battery cell 3, it is arrange | positioned in the position which does not overlap with a flow path. Therefore, the cooling performance of the power storage module 1 is ensured.

  In addition, the electrical storage module which concerns on this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

  For example, in the above embodiment, the spacer 5 is provided as the adjacent member. However, the present invention is not limited to this. The adjacent member may be a termination member.

  Further, in the above embodiment, the thickness of the protruding piece 531 of the first side portion holding portion 53B is the same as the thickness of the region in contact with the battery cell 3 in the flow path forming portion 54. However, the present invention is not limited to this. The thickness of the projecting piece (holding portion) is preferably equal to or less than the thickness of the region in contact with the power storage element in the flow path forming portion.

  Moreover, in the said embodiment, the convex-shaped part 530b and the protrusion 531 are provided for every opening 533 opened in the extension part main body 530a. However, the present invention is not limited to this. The convex portion and the projecting piece may not be provided corresponding to all the openings opened in the extension portion main body.

  In the above embodiment, the flow path forming portions 54 as the groove forming portions are provided on both surfaces of the spacer body 50. However, the present invention is not limited to this. The groove forming part may be provided only on one surface of the main body.

  Moreover, in the said embodiment, a flow path is an air path which lets air pass. However, the present invention is not limited to this. The flow path includes one that passes a cooling medium other than air.

  Moreover, in the said embodiment, the lithium ion secondary battery was demonstrated. However, the type and size (capacity) of the battery are arbitrary.

  Further, the present invention is not limited to the lithium ion secondary battery. The present invention is also applicable to various secondary batteries, other primary batteries, and capacitors such as electric double layer capacitors.

  DESCRIPTION OF SYMBOLS 1 ... Battery module (electric storage module), 3 ... Battery cell (electric storage element), 30 ... Case, 31 ... Case main body, 32 ... Cover body, 33 ... Electrode terminal, 34 ... Bus bar, 5 ... Spacer (adjacent member), 50 ... spacer body (main body), 51 ... holding body, 52 ... corner holding part (positioning part), 52A ... upper corner holding part, 52B ... lower corner holding part, 53 ... inter-corner holding part, 53A ... Top part holding part, 53B ... 1st side part holding part, 53C ... 2nd side part holding part, 530 ... Extension piece (extension part), 530a ... Extension part main body, 530b ... Convex part, 531 ... Projection piece (Holding part) 532 ... Projection 533 ... Opening 54 ... Flow path forming part 540 ... Groove part 542 ... Bottom part 543 ... Inner wall part 541 ... Projection strip 544 ... Top part 545 ... Side wall part, 7 ... Frame , 70 ... Termination member, 71 ... Termination member main body, 72 ... Leg part, 75 Connecting member, 76 ... cross beam portion, 77 ... vertical beam portion, 85 ... bolt, 9 ... cell monitor circuit (CMU) module, 90 ... circuit case, 91 ... case body, 92 ... lid

Claims (7)

A storage element;
An adjacent member arranged side by side on both sides of the electricity storage element,
The adjacent member is
A main body facing the power storage element;
An extending part extending from the main body to the power storage element side;
A holding portion provided on a distal end side of the extending portion, the holding portion holding the power storage element in cooperation with the main body,
The main body has a flow path forming part that forms a flow path between the main body and one surface of the power storage element facing the main body .
The holding portion is Oite to the body, the flow path forming portion of the other adjacent member faces opposite to the other surface of the storage element be other adjacent member adjacent across the energy storage element is provided provided at the position,
The flow path forming unit is provided on both surfaces of the main body, and the power storage module is arranged with the positions shifted from each other on both surfaces . A storage element;
An adjacent member arranged side by side on both sides of the electricity storage element,
The adjacent member is
A main body facing the power storage element;
An extending part extending from the main body to the power storage element side;
A holding portion provided on a distal end side of the extending portion, the holding portion holding the power storage element in cooperation with the main body,
The main body has a flow path forming part that forms a flow path between the main body and one surface of the power storage element facing the main body .
The holding portion is Oite to the body, the flow path forming portion of the other adjacent member faces opposite to the other surface of the storage element be other adjacent member adjacent across the energy storage element is provided provided at the position,
The extension part extends from the flow path forming part in the main body from the opposite side of the groove formed by the flow path forming part.
A charge reservoir module. The power storage module according to claim 1 or 2, wherein a thickness of the holding portion is equal to or less than a length of the flow path forming portion. The power storage module according to claim 1 , wherein a length of the holding portion in a direction intersecting with a direction in which the holding portion extends is equal to or less than a length of the flow path forming portion in the same direction. A spacer disposed between the power storage elements;
The power storage module according to any one of claims 1 to 4, further comprising a terminal member that sandwiches the power storage element and the spacer. The power storage module according to any one of claims 1 to 4, wherein the adjacent member is a spacer disposed between the power storage elements. The extension part is
An extension body,
A protruding portion that partially protrudes from the tip of the extending portion main body, the protruding portion extending beyond the power storage element, and disposed so as to overlap the flow path forming portion of the adjacent member. ,
Storage modules according to prior Symbol holding unit, any one of claims 1 to 6 are connected to the convex portion.

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